Thanks for the posts with help and ideas!
I have tried further and am currently testing with “xset” to turn off/on the screen and it seems to work well.

I have “stolen” code and ides from these articles:
Cheap PIR Sensors and the Raspberry Pi - Part 1
Exit screensaver on Raspberry Pi with motion sensor
So I will not publish any code… :-)

//Serimner

@qu1que - Thanks for your reply - really smart to use USB on the screen to see screen activity!
But unfortunately vcgencmd does not work in my configuration/hardware.
It sets the value, but it does not turn off the 7 inch touch LCD…

@sdetweil - Thank you for your feedback.
It was one of the ideas I tested. The problem is that when MM updates its view (or the weather updates), bl_power is reset and the screen lights up again…

/S

@sdetweil
Hi Sam,
I have installed this on my PI:
Raspbian Buster 4.19
MagicMirror v2.8.0
Node v10.16.3
pm2 v3.5.1
I have installed this using the installationguide the provide (I’m real noob at this).

The module I have tested most is MMM-PIR-Sensor (https://github.com/paviro/MMM-PIR-Sensor)
My configuration:

module: "MMM-PIR-Sensor",
position: "fullscreen_below",
config: {
	sensorPin: 22,
	powerSaving: true,
	powerSavingDelay: 1,
}

But I can see in the code that MMM-PIR-Sensor uses vcgencmd!
When i test “vcgencmd display_power = 0/1” from terminal it do not work om my hardware.

If I try “echo 0/1 > /sys/class/backlight/rpi_backlight/bl_power” it works fine but…
Every time MM updates its view, MM resets bl_power and light up the screen.
(BTW, I have testet my PIR-sensor in Python and it works as expected…)

//S

Hello,
Maybe this question has been put to the wrong forum, but I chance.

I’m trying to use the Raspberry-Pi 7 "touch LCD with a PIR sensor.
My goal is to have a photo frame with MM information. When no activity is detected, I want the screen to turn black (powersave) but when the PIR sensor detects activity, the screen should light up.
I have tried all the modules that have to do with PIR sensors, but none of these work for me. At the start of MM I get a black screen with a mouse pointer, nothing more …

My question is - is there anyone in this forum that has built something similar?
If so, do you have any tips ?!

//B